Almost everywhere I've worked, the "designing and writing code" part was about 5% to at most 10% of the calendar time that it takes to make and release a software product. The remaining 90-95% of the time is: aligning stakeholders, meeting with all contributing teams to prioritize, gaining approval from various executives to commence the project, obtaining security reviews, privacy reviews, legal reviews, and so on, soaking in dev, staging, and beta environments to find bugs, manual QA testing, aligning with marketing--potentially waiting on key external marketing events, waiting for various people to come back from vacation, waiting for Mike to answer his E-mail... These things take the vast majority of a software project's time and can't be automated by AI.

So, AI is making 5-10% of your project much faster. Whoopdie doo.